This heating element control with up to 3 kW was obtained from an old American documentation. SCRs must be load-compliant, and transistors can be current equivalents.
This 4.5 MHz amplifier is suitable for analog TV applications. We found it in a 1967 Philips...
This circuit is one of many that can be found in this section using the 555. This circuit was...
We found this circuit in the 1994 National Semiconductor Linear Applications Handbook. The circuit is...